Frost dates in Colchester, IL
The average last spring frost in Colchester is around May 1 and the first fall frost is around October 12. That gives Colchester an average growing season of about 164 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | May 1 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | September 23 |
|---|---|
| Average (50%) | October 12 |
| Late (90% chance before) | October 25 |